Uml introduction
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UML introduction. A short introduction to UML Eivind J. Nordby Karlstad University. Design Problem. Complex systems cannot be understood without modelling Modelling makes design reproductable Modelling is documentation => Generic Language for this Problem Unified Modeling Language (UML)

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Uml introduction

UML introduction

A short introduction to UML

Eivind J. Nordby

Karlstad University

2000-05-09


Design problem

Design Problem

  • Complex systems cannot be understood without modelling

  • Modelling makes design reproductable

  • Modelling is documentation

  • => Generic Language for this ProblemUnified Modeling Language (UML)

  • Standard of the OMG

  • Current Version 1.4 (since Sep. 2001)

  • Inventors: Jacobson, Rumbaugh, Booch et all.

  • Goal: Giving developer a general language for communication

Semla 2 page 2


Uml introduction

UML

  • UML is a graphical language

    • Unified Modeling Language

  • UML provides a notation to describe software-intensive systems in an object-oriented way

    • Is general enough to describe nonsoftware systems

  • Static Modelling

    • Class Modelling

    • Component Modelling

    • Deployment Modelling

  • DynamicModelling

    • Activity/Sequence Modelling

    • Use Case Modelling

    • State Modelling

Semla 2 page 3


An example

An example

  • A booking system for room reservation

  • The initiator tell who shall take part in the meeting

  • The system calls the participants by email

  • The participants reply confirm by email

  • When all have confirmed, the system sends an email to the initiator

    • Support personnel are also notified

      • Cleaning, catering, secretaries, caretaker

Semla 2 page 4


Part 1

Part 1

Classes and objects

Static description

2000-05-09


Basic class description

A class is drawn as a box with compartments for

class name

attributes

operations

Any but the first can be empty or suppressed

Basic class description

Semla 2 page 6


Inheritance

Inheritance

A connection with an open triangle in the direction to the base class

Abstract classes and operations

Italic class name

Italic operation name

Inheritance

Semla 2 page 7


Associations

Analysis diagram

Multiplicities

0..1, 1, *, 1..*

Associations

Semla 2 page 8


Associations1

Association label

a verb describing the interaction

Interpretation of multiplicity

Referencial integrity

Associations

Semla 2 page 9


Object diagram and links

Class diagrams show the general structure with

Object diagrams show snapshots

objects are underlined

Object diagram and links

  • An association is a potential for a link

    • links are instances of associations

  • Links do never have multilplicities

Semla 2 page 10


Role names

Role label

a noun describing the role in the interaction

Role names

Semla 2 page 11


Aggregations

Aggregation

a crew is composed of crew members

expresses whole - parts

Composition

a person owns a PID number

expresses exclusive ownership and dependency

Aggregations

Semla 2 page 12


Navigability

Analysis expresses relationships

Design diagram also expresses navigability

Part of the implementation design of “who keeps track of who”

Navigability

Semla 2 page 13


Part 2

Part 2

Interactions

Dynamic description

2000-05-09


Interactions

Interactions

Semla 2 page 15


Interactions1

Interactions

Semla 2 page 16


Interactions2

Interactions

  • Sequence diagram

    • Time based

  • Life line

  • Call, operation, return

  • Activation record

  • Recursive calls

  • New and delete

Semla 2 page 17


Interactions new and delete

Interactions, new and delete

Semla 2 page 18


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